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FILE - In this Sept. 30, 2012, file photo, the United States Simon Cho takes adjusting his skates after racing in a 500 meter semifinal at the U.S. Single Distance Short Track Speedskating Championship in Kearns, Utah. Cho said Friday, Oct. 5, 2012, he agreed to a coach's demand to tamper with a Canadian rival's skates last year after the command was made a third time and in Korean by Jae Su Chun. Chun has denied any wrongdoing but is suspended. (AP Photo/Rick Bowmer, File)

FILE - In this Sept. 30, 2012, file photo, the United States Simon Cho takes adjusting his skates after racing in a 500 meter semifinal at the U.S. Single Distance Short Track Speedskating Championship in Kearns, Utah. Cho said Friday, Oct. 5, 2012, he agreed to a coach's demand to tamper with a Canadian rival's skates last year after the command was made a third time and in Korean by Jae Su Chun. Chun has denied any wrongdoing but is suspended. (AP Photo/Rick Bowmer, File)